Samsung 400Pn, 400P Owner's Manual page 123

Period
Time
3. Video Wall
This offers a function that enables you to use several monitors as one screen.
First, select the button that sets the number of monitors to be used and their allocation. The
allocation figure will appear as a selectable button on the side.
For example, when you choose 2*2, selectable buttons in the form of 2 rows and 2 lines
appear,
and if you select number 3 in this matrix, the third screen of the output screen divided by 4 will
show up in the monitor.
2*2
3*3
4*4
1*5
5*1
OFF
Format